Partial Derivatives of ln(x+y)/(xy)

[littlesohi]

I need help with this one:

Find fxy in:

ln(x+y)/(xy) .. the ln applies to the whole problem.

 

[arildno]

I need help with this one:

Find fxy in:

ln(x+y)/(xy) .. the ln applies to the whole problem.

Well.

You might rewrite this using the prortyies of the logarithm, say:
f(x,y)=ln(x+y)-ln(xy)=ln(x+y)-ln(x)-ln(y)